Device for securing screwed assemblies and method using the device

A method for producing and endorsing screwed assemblies, said method implementing a device comprising a screw gun intended to be handled by an operator, and computer equipment connected to the screw gun, the screw gun being equipped with measurement sensors sending information representative of the torque applied by the screw gun and an angle of rotation applied by the screw gun, the computer equipment storing, in a memory, reference data relating to a screwed assembly to be produced, the method comprising the following steps:

• measuring a contact angle provided that the measured torque is less than or equal to a contact torque,
• comparing the measured contact angle with a reference contact angle of multiple turns that is associated with a tolerance and contained in the memory as reference datum,
• providing a notification as to the conformity of the measured contact angle with respect to the reference contact angle,
• then measuring a tightening angle provided that the measured torque is less than or equal to a tightening torque,
• comparing the measured tightening angle with a reference tightening angle that is associated with a tolerance and contained in the memory as reference datum,
• providing a notification as to the conformity of the measured tightening angle with respect to the reference tightening angle,
• the contact torque being less than or equal to the tightening torque of the screwed assembly.